The HardyâWeinberg principle provides the solution to how variation is maintained in a population with Mendelian inheritance. According to this principle, the frequencies of alleles (variations in a gene) will remain constant in the absence of selection, mutation, migration and genetic drift.
Rxâd â A definition: A lot of new Crossfitters come in and ask âwhat does the Rxâd mean that everyone puts in their posts?â This is a very valid question and one that everyone should be thinking about. This post is to clearly define why one uses âRxâdâ. Rxâd simply means âas prescribedâ.
The Rp thread is a designation for BSPP (British Standard Pipe Parallel). For example, Rp 1/4. refers to the threaded end of a fitting or pipe which is 1/4 inch trade size (not actually 0.25 inches), and having British Standard Parallel Pipe threads.